211393394536 has 8 divisors (see below), whose sum is σ = 396362614770. Its totient is φ = 105696697264.

The previous prime is 211393394521. The next prime is 211393394543. The reversal of 211393394536 is 635493393112.

It can be written as a sum of positive squares in only one way, i.e., 210962001636 + 431392900 = 459306^2 + 20770^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 211393394536.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13212087151 + ... + 13212087166.

Almost surely, 2^211393394536 is an apocalyptic number.

It is an amenable number.

211393394536 is a deficient number, since it is larger than the sum of its proper divisors (184969220234).

211393394536 is a wasteful number, since it uses less digits than its factorization.

211393394536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26424174323 (or 26424174319 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 49.

The spelling of 211393394536 in words is "two hundred eleven billion, three hundred ninety-three million, three hundred ninety-four thousand, five hundred thirty-six".